Stack-furnace construction.



No. 853.698. PATENTED MAY '14, 1907.

J. LA. HUNTER.

'STACK FURNAGE CONSTRUCTION.

APPLIoA'rIoN num Nov.1z.19oe.

3 SHEETS-SHEET 1.

No. 353,698. PATENTED MAY14, 1907.

. J. L'.' HUNTER. STACK PURNAGE GONSTRUGTIUN.

' APPLICATION FILED NOV. 12. 1906.

' 3 SHEETS-SHEET .2.

www j. im @awww www? PATENTED MAY 14, 1907.

3 slums-SHEET s.

mvENTon j. i". am

aff/.wma new.,

r L .wd w. n n 4 J. L. HUNTER. STACK FURNAGE CONSTRUGTIN.

APPLICATION FILED NOV. 12.1906.

WITNESSES UNITED STATES PATENT OFFICE.

JOSEPH L. HUNTERQOF ROANOKE, VIRGINIA.

srA'cK-FURNACE CoNsTnuoTloN. i

Specicaton of Letters Patent. Appunti@ mea November 12. 190s. Seriana. 342.944.

Patented May 14, 1907.

To all, whom it may concern:

Be it known that I, JosEPn L. HUNTER, of

Roanoke, Roanoke county, Virginia, have invented a new and useful Stack-Furnace Construction, of which the following is a full clear, and exact description, reference being had to the acolnpanymgdrawmgs, forming part of this specification, 1n which- Figure 1 is a side elevatlon, one half in secro tion, showing my invention as applied to a blast furnace; Fig. 2 is an enlarged partial vertical section; Fig. 3 1s a front elevation showing the arrangement of the ring seg-4 ments and their connections; Fig. 4 is a cross section of Fig. 3; Figs. 5 and 6 are enlarged detail views of one of the plates or segments; and Fig. 7 is'an enlarged perspective view of the same showing the projections for holding the lining.

My invention relates to the construction of stack furnaces, such as cupolas, blast furnaces, and other smelting furnaces.

The object of the invention is to provide a strong efficient structure which will provide z 5 for supporting the same on structural framework at different points in its' height.

A further object of the invention is to en'- able thefurnace to be. cheaply and easily lined withv refractory material in a lplastic 3o form, and also to provide for an efficient Water circulation. l

In the drawings, I show' a blast furnace composed of a series of superimposed rings, each ring formed of cast iron segment pl-ates 3 5 2, as shown in the detail Figs. 3 to 7 inclusive.

These segment plates are preferably cast with a surrounding flange or rib 3 by which they may be bolted together atboth top and bottom and sides through the bolt holes 3'; and

are provided on their inner faces with inte gral prongs or projections 4. All or part of the rings may be formed with these projections, but I prefer to so form all of the plates above the level of the twyers. The lining 4 5 of refractory material is applied to the inner faces of these plates having the projections7 the projections serving to hold the refractory lining 5 in place, as shown in the drawings.

The lining may thus be easily and cheaply applied, and will be securely held in position.v Surrounding the Wall of the furnace is a.

lstructural frame-work having vertically-extending columns 6,--of which there may be an)v desired number around the circumfer- 5 5 once of the furnace. These columns are suitably connected together and are provided at different levels with brackets 7 which vengage projecting flanges 8 cast integral with some of the rings or plates. I have shown four of thesuperimposed rings as forming one section or belt, the lower-most ring of each section having the flange 8 Which is carried upon the surrounding structural work.

' This lower-most ring of each belt preferably interits with. the upper ring of the next lower belt by forming the top ring of the next lower section with an annular recess, as shown at 9 into which the bottom ring of the next section above will enter, thus forming .an-expansion joint between the sections or ply pipes 16 into the lower ring of each sectlon. I do not desire to limit myself, how.

ever, to this arrangement of pipes or passages formed in the castings, since sprays or jets of water or other cooling systems may be empl oyed.

The circular water supplypipes 16 are preferably inde endent of each other and the fiuid to eac section may be controlled by hand valves 17 in the pipes connecting the mains to the cooling system of each section.

In order to strengthen the sections, I preferably reinforce the top of each section by an encircling band 1S formed of steel or Wrought iron, this band extending around the furnace and binding the plates against outward' movement or distortion. Each section is preferably vprovided with a platform 19 which is built on the surrounding structural frame-Work, thus giving easy access for adjustment of the water supply to each section,

or repairs tothe parts. Suitable communication may be had betweenthe platforms at different levels by means of ladders or other suitable communication.

The Waste troughs 15 may be connected by pipes 20 to the general Waste pipe 21 which extends vertically along one side of the furnace. f

The hopper system 22 and the top work ofthe furnace may be supported upon the ICO . nace and assists in surrounding structural frame-work containing the vertical column 6, thus taking this weight off the furnace body proper.

The advantages of my invention result from supporting therings forming the wall at different levels through the height of the furnace; also from forming the Wall of rings or circular sections which are easily removed and replaced. The interfitting arrangement of one section with the next assists in holding l the sections in proper position, while allowlng expansion and contraction. The exterior independent structural work lserves to supportthe furnace Wall, and may also be used to support the bell system and the top work. The cooling of the several sections -is easily controlled others, and all parts are easily accessible. The use of the pronos or projections on the inner faces of the pilates enables the lining to'be easily and cheaply applied in plastic form. This alsoprolongs thelife of the furpreventing the burning away or cutting out of the lining. With my construction also, the lining may be quickly and thoroughly dried by circulating steam -through the coils of the plates prior to starting the furnace. .4

Many variations may be made in the forni and arrangement of the furnace and its parts without departing. from my invention.

I claim 1. A stack furnace of varying cross-sectional areas at different levels having above the mantle a metallic jacket composed of annular sections, and exterior structural lframe-work around the furnace supporting some of said sections; substantially as described.

2. Astack furnace of varying cross-sectional areasl at different levels, and having a metallic jacket composed of annular sections with internal projections, a lastic lining molded in Contact ,with said) projections above the mantle level, and exterior struc-- tural frame-work independent of the furnace proper and having supports for sections of the jacket above the mantle; substantially as described.

`3. A stack furnace of varying cross-sectional areas'at different levels having above ,the mantle a metallic jacket composed of annular sections, some of'said sections being sup orted upon -exterior structural framewor substantially as described.`

4. A- stack furnaceof varying cross-sectional areas at different levels having a metallic jacket formed in'circular sections and columns arrangedl around the furnace and ,extending above themantle, said columns having above said level brackets to support the sections; substantially as described.

' 5. A stack, furnace of varying cross-sectional areas at diferentlevels having above independently of the i the mantle level a metallic jacket formed in circular sections with expansion joints between said sections; substantially as `described.

6. A stack furnace of varying cross-sectional areas at different levels having .above the mantle level a metallic jacket formed in circular sectionsl with expansion joints between said sections, and exterior structural frame-work extending above the mantle level and arranged to support the sections; `'substantially as described. 7. A stack furnace of varying cross-sectional areas at different levels'having a metallic jacket extendig` upwardl from the mantle level and formed of circu ar sections, each section composed ofseparate plates secured together, means for cooling said plates, and an exterior structural frame-work extending above the mantle level and arranged to support the sections at different levels; substantially as described. 8..A stack furnace 'of varying cross-sectional areas at different levels having a metallic jacket extending upwardly from the mantle level and composed of circular sections supported on exterior frame-work extending above the mantle level and separate 4water cooling sections for each c ircular section; substantially as described.

9. A stack furnace of varying cross-scctional areas at different levels having ametallic jacket extending upwardly from the' mantle level and formed in circular sections and arranged to allow expansion and contraction between. the sections, a hopper and an exterior structural frame-work. arran ed to support the hopper and top work; su )stantially as described.

f 10. A stack furnace of varying cross-sectional areas at different levels having acom- -plete inclosing metallic jacket formed of separate water-cooled circular sections, said sections having internal projections arranged to support the lining, and exterior structural frame-work arran ed to support the sections at their different lgevels; substantially as described. 11. A stack furnace of varying cross-sectional areas at different levels having a complete inclosing metallic jacket formed of separate water-cooled circular sections, said sections having internal projections arran ed to support the lining, exterior structural ramewor arranged to su port the sections at their different levels; ang surrounding bands for the sections; substantially as described.

In testimony whereof, I-have hereunto set 4my hand.

Jos. L. HUNTER.

IlO 

